/* 
 Font mixin usage

  @include font-face(OpenSans, "../fonts/OpenSans-Light", 300, normal, ttf);
  @include font-face(OpenSans, "../fonts/OpenSans-Regular", normal, normal, ttf);
  @include font-face(OpenSans, "../fonts/OpenSans-Medium", 500, normal, ttf);
  @include font-face(OpenSans, "../fonts/OpenSans-Bold", bold, normal, ttf);
  
 */